Part of the reason I gave up on my relationship with my father is that he started off defensive when learning about computers and devolved into a full on adult tantrum when I told him he didn’t need to know everything at the start. Specifically I was setting up DNS and he wouldn’t let me continue but refused to listen to anything I had to say. Still bothers me. Were I richer I’d get therapy for it but as it is I don’t think there’s any reconciling between us at this point.